C4-3 More Polymers

The diagram shows a naturally occurring polymer. What name do we give tot his polymer?

• DNA

• mRNA

• RNA

• t-DNA

Carbohydrates are molecules used by living things to store energy. They all contain carbon, oxygen and hydrogen.

Starch is a complex carbohydrates made up of many smaller sugar units joined together in a long chain.

What name do we give to molecules made up of many repeating units?

Amino acids form polymers known as proteins via condensation polymerisation.

Which diagram could show the formation of proteins?

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Amino acids form polymers known as proteins via condensation polymerisation.

Which small molecule is eliminated when this occurs?

• H2O

• HCl

• HCN

• NH3

All the atoms in a polymer chain are held together by ...

• ...strong metallic bonds

• ...strong covalent bonds

• ...strong ionic bonds

• ...intermolecular forces

Which forces hold polymer chains together?

Changing which of these will NOT make a polymer stronger?

• Length of chain

• Adding cross linns

• Making the polymer more crystalline

• Adding plasticiser

Which of the following will NOT make the melting point of a polymer higher?

• Making the chain longer

• Adding cross links

• Adding plasticer

• Making the polymer more crystalline

Which of the following will NOT make the a polymer stronger?

• Making the chain longer

• Adding cross links

• Adding plasticer

• Making the polymer more crystalline

Which of the following will make a polymer more crystalline?

• Making the chain longer

• Adding cross links

• Adding plasticer

• Adding branches